Big 12 commissioner Bob Bowlsby said in a statement announcing the news that Iowa State had a written event management policy that “was not thoroughly implemented and was unsuccessful in ensuring the safety and security of all visiting team game participants.”

Iowa State responded to the Big 12 on Monday saying that it had reviewed the incident and determined that event staff had followed all post-game celebration policies approved by the Big 12 on Aug. 31, 2018.

“Our institution takes the safety and welfare of all student-athletes, officials and fans very seriously and we will continue to review and refine our safety protocols based upon our actual experiences,” Iowa State president Dr. Wendy Wintersteen said in a statement issued by the school Friday.